395 results about "Valsartan" patented technology

The invention specifically relates to a preparation method for a dual inhibitor LCZ696 of angiotensin II receptor and neprilysin, which belongs to the technical field of drug synthesis. The preparation method comprises the following steps: preparing valsartan and AHU-377 or AHU-377 calcium salt at first; and then mixing valsartan with AHU-377 or AHU-377 calcium salt under stirring so as to prepare LCZ696. The LCZ696 prepared in the invention has good quality and high purity; and the preparation method has the advantages of simplicity, low energy consumption, low cost and suitability for large batch production.

The present invention provides an improved method used for synthesizing valsartan. No tin compounds are required in the reaction. In the method, the condensate of N-[(2'-cyano-1, 1'- biphenyl-4-group)-alkyl]-L-valine ester is used as raw material. And the method comprises valerylation and synthesis of the valsartan. The method has the advantages of easily available raw materials, simple operation, no environmental pollution, high yield, low cost, and suitability for large-scale industrial production.

A process for preparing valsartan.

The invention relates to a pharmaceutical composition containing Amlodipine besilate and valsartan and a preparation method thereof. The pharmaceutical composition is prepared from the following ingredients in parts by weight: 5 parts of Amlodipine besilate, 80 parts of valsartan, 60 parts of microcrystalline cellulose, 4.7-13.2 parts of croscarmellose sodium, 4.8 parts of silicon dioxide and 1.6parts of magnesium stearate. The pharmaceutical composition is prepared by using a direct powder compression technique. The invention can reach the dissolution rate of more than 90% by using less disintegrating agent, and has advantages of good stability and faster disintegrating. The preparation method of the invention has simpler production process, reduces the investment of corresponding equipment and plants and saves the production cost; the tablet produced by using direct powder compression technique has faster disintegrating and is helpful to improve the dissolving of pharmaceutical; through detection, the tablet prepared by using the method is dissolved out by more than 90% within 15 min.

A pharmaceutical composition comprising a solid unit dosage form comprising: one or more of pharmaceutically active ingredients selected from valacyclovir, olanzapine, voriconazole, topotecan, artesunate, amodiaquine, guggulosterone, ramipril, telmisartan, tibolone, atorvastatin, simvastatin, amlodipine, ezetimibe, fenofibrate, tacrolimus, valgancyclovir, valsartan, clopidrogel, estradiol, trenbolone, efavirenz, metformin, pseudoephedrine, verapamil, felodipine, valproic acid/sodium valproate, mesalamine, hydrochlorothiazide, levosulpiride, nelfinavir, cefixime and cefpodoxime proxetil in combination with a water insoluble polymer and/or a water soluble polymer. Methods for making the pharmaceutical composition are also disclosed.

The invention discloses to dispersible tablets containing valsartan and amlodipine besylate and a preparation method thereof, and relates to medicament dispersible tablets and the preparation method thereof, solving the problem of poor stability, slow disintegration and dissolution, low oral bioavailability and high cost existing in the traditional medicine containing valsartan and amlodipine besylate. The dispersible tablets are prepared from valsartan, amlodipine besylate, disintegrant, diluent, adhesive, lubricant, fluidizer, surfactant and flavoring agent. The method comprises the following steps of: weighting and screening materials; mixing the valsartan, disintegrant and diluent to obtain mixed powder A; mixing amlodipine besylate and the mixed powder A to obtain mixed powder B; mixing the adhesive, surfactant and the mixed powder B to prepare soft material; screening, granulating and drying the soft material; mixing and screening and the dried granules with the fluidizer, lubricant, disintegrant and flavoring agent; and finally carrying out size stabilization and tabletting. The medicine prepared by the method has good stability, fast disintegration and dissolution, high oral bioavailability and low cost.

The invention discloses a preparation method of high purity valsartan, which comprises the following steps: drying after a valsartan crude product is recrystallized through esters solvent, dissolving in inorganic base aqueous solution, then adjusting the inorganic base aqueous solution to be acidic by using hydrochloric acid, washing materials by using acid water solution after centrifugation, drying and crushing, and producing the high purity valsartan through centrifugation and drying. The method is simple to operate, the prepared valsartan is high in purity and has the quality that relevant impurities are not detected, chiral isomers are not detected, individual solution remains is smaller than 100 ppm, frequently-used reagents are used, the cost is low, the access is easy, the cost is lower, and meanwhile, the preparation method is beneficial to environmental protection and suitable for industrialized production.

The invention relates to a medicinal oral preparation containing Valsartan and Hydrochlorothiazide, more specifically the dispersible tablets for enhancing the beneficial effects of Valsartan and Hydrochlorothiazide.

The invention relates to an angiotensin receptor inhibitor and a solid preparation of amlodipine and a novel method for preparing the same. The method comprises the following steps that: 1, valsartan and amlodipine are screened respectively until the grain size of the valsartan and amlodipine is qualified; 2, the valsartan and amlodipine are added with proper amount of excipient respectively and the mixture is evenly mixed; and 3, the evenly mixed powder are added with proper amount of bonding agent or wetting agent respectively to obtain grain in proper grain size, and the grain is dried.

The invention provides an improved method for synthesizing valsartan. The valsartan synthesized by the method can be further purified to give high-purity valsartan. In the method, tin compounds are not used, N-[(2'-cyano-1,1'-biphenyl-4-yl)alkyl]-ester L-valine monohydrochloride is used as a raw material, pentaacylation, diazotization and saponification are performed to obtain the valsartan, a crystallization process is controlled and thus the high-purity valsartan is obtained. The method has the advantages that: the operation is simple; the yield is high; the product purity is high; and the industrial production is easy.

The invention discloses a valsartan nanosuspension, a spray-dried power, and a preparation method of the valsartan nanosuspension and the spray-dried power. A valsartan spray-dried nanosuspension and a preparation method of the valsartan spray-dried nanosuspension belong to the field of nano-drug preparations. The valsartan spray-dried nanosuspension consists of 1 part of valsartan, 0.1-1 part of a stabilizing agent and 10-100 parts of a spray-drying protecting agent by mass; the valsartan spray-dried nanosuspension is prepared by an anti-solvent precipitation method and/or a high-pressure homogenizing method and/or an acid-alkali neutralization method in combination with a spray-drying technology. The drug particles in the spray-dried powder are reduced to a nano-grade, and the hydrophilicity, the in vitro dissolution rate and the bioavailability of the valsartan are greatly improved. The powder can be directly processed or be processed together an excipient into tablets, capsules and the like. The valsartan spray-dried nanosuspension has the advantages of simple preparation process, stable product quality and easy implementation of productization.

The invention discloses a method for refining Valsartan containing higher isomer impurity, namely Valsartan containing more than 10% (HPLC detection peak area method) of N isomer is refined by adopting butanone or the mixture solvent of butanone and esters and ethers, the N isomer can be remarkably reduced to about 1.0%, and the yield can be as high as more than 50%.

The invention relates to valsartan capsules and a preparation method thereof. The valsartan capsules comprise the following components in parts by weight: valsartan 50-200 parts, microcrystalline cellulose 30-160 parts, crosslinked povidone 1-10 parts, sodium dodecyl sulfate 0.8-4 parts, povidone K30 1-9 parts, and magnesium stearate 1-3 parts. The valsartan capsules provided by the invention canbe used for treating mild and moderate primary hypertension. The valsartan capsules have the advantages of reasonable formula, feasible process, stable and reliable quality, and good stability, dissolution and bioavailability. The valsartan capsules are prepared by using a wet granulation process, the addition method of solubilizer sodium dodecyl sulfate is proper, the concentration of the bonding agent is proper, and the granules have angle of repose smaller than 40 degrees, belong to powders with good fluidity and can meet the need of capsule filling. The valsartan capsules have short production process and low production costs, and are easy for industrial production.

The invention discloses a method for crystallizing valsartan. The method comprises the following steps of: dissolving a valsartan crude product by using an ester solvent; cleaning the ester solvent layer by using water to recover the dry solvent; adding an ester solvent for dissolving the material; adding an alkane solvent after dissolving; stirring and cooling to a first stage temperature of 15 to 20 DEG C, and preserving the heat; then cooling to a second stage temperature of -3 to 3 DEG C, and preserving the heat; centrifuging; and drying to obtain the valsartan. The method is simple to operate, high in yield and low in cost, the mass yield is over 85 percent, the obtained valsartan is high in quality, and the used reagents are common reagents which are cheap and easily obtained. Meanwhile, the method is an industrial crystallization method which is very suitable for industrial production and provides a technical support for large-scale industrial production.

The invention provides valsartan dispersible tablets and a preparation method thereof, which contain effective doses of valsartan and pharmaceutical adjuvants, which include disintegrants, diluents, binders, lubricants, glidants and surface Active agent, based on 100 parts of valsartan, the dosage of disintegrating agent is 2-50 parts, the dosage of diluent is 10-150 parts, the dosage of binder is 2-25 parts, and the dosage of lubricant is 0.5-20 parts. The dosage of the liquid agent is 0.2-10 parts, and the surfactant is 0.1-2.5 parts; the present invention also provides the preparation method of the valsartan dispersible tablet. Compared with other dosage forms, the valsartan dispersible tablet has a good dispersion state , Short disintegration time, rapid drug dissolution, convenient administration, low production cost, no need for special equipment, convenient and stable carrying and transportation, etc.

The invention discloses a compound amlodipine and valsartan solid preparation and a preparation method thereof. The preparation can be a tablet or a capsule and contains 2.5-10g of amlodipine or pharmaceutically acceptable salt thereof (calculated according to the amlodipine) and 40-640g of valsartan or pharmaceutically acceptable salt thereof (calculated according to the valsartan). The preparation method of the compound amlodipine and valsartan solid preparation comprises the steps of mixing the two medicines and the corresponding medicinal auxiliary materials according to the proportion, mixing with the corresponding lubricant or glidant after granulating in a wet method, and pressing into a tablet or filling into a capsule so as to obtain the compound amlodipine and valsartan solid preparation. In the invention, the tablet or the capsule is prepared after the two active substances with unequal doses are granulated in the wet method, and the method is simple and convenient, is easy to control the quality and is suitable for the industrialized production. More than 85% of the amlodipine in the preparation is dissolved out within 30 minutes, and the invention has favorable market popularization prospect.

The invention relates to a valsartan amlodipine capsule medicine compound and a preparation method thereof. The compound uses valsartan and amlodipine as raw materials, containing one or more medicinal excipient. The preparation method thereof comprises the step of respectively mixing the valsartan and amlodipine with selective thinner, adhesive, disintegrating agent, antitack agent and lubricant, adding a proper wetting agent to make into softwood, sieving for making into wet grain, drying the wet grain, sieving, mixing uniformly and making into orally taken preparation which has obvious effect for treating hypertension.

The invention provides a valsartan compound and a new manufacturing method thereof. In the invention, through specially designed methods for acid and alkali conversion and absorption by macroporous absorption resin, the aim of refining and purifying can be fulfilled; and thus, the high-purity valsartan compound is obtained, the product quality of the preparation is improved, the toxic and side effects are reduced, and the clinic medicine safety of the valsartan in the preparation of antihypertensive medicines is guaranteed.

The invention relates to a compound valsartan benzenesulfonic acid amlodipine medicament composition and a new preparation method thereof. The compound valsartan benzenesulfonic acid amlodipine medicament composition is in a capsule type and is prepared by adopting the preparation method of a solid dispersion technique so that the dissolution of a medicament and the adsorption of the medicament in gastrointestinal tracts can be obviously promoted. The preparation method overcomes the defects of poor dissolution outside benzenesulfonic acid amlodipine and low bioavailability, greatly improve the quality of a preparation product and can realize industrial production.